Composition With Improved Cleanliness For Lubrication Of Steam And Gas Turbine Systems
AssigneeThe Lubrizol Corporation
InventorsBetsy J. Butke, Allan R. Barber
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Abstract
The present invention relates to the use of an additive composition that contains the combination of two specific types of antioxidants with one or more of four specific types of dispersants in a Group II and/or Group III base oil-containing lubricating composition. The lubricating composition of the present invention provides improved cleanliness in steam and gas turbine systems. The invention further relates to the process to make the novel additive composition and its use in industrial fluids.
Claims15
A lubricating oil composition comprising:
- a) an oil of lubricating viscosity comprising a Group II base oil, a Group III base oil, or combinations thereof;
- b) an antioxidant component comprising:
- (i) an alkylated diphenylamine, and
- (ii) a substituted hydrocarbyl mono-sulfide;
- c) a dispersant component comprising at least one of:
- (i) a polyetheramine,
- (ii) a borated succinimide dispersant,
- (iii) a non-borated succinimide dispersant,
- (iv) a Mannich reaction product of a dialkylamine, an aldehyde and a hydrocarbyl substituted phenol;
- and
- d) optionally one or more additional additives.
A process to prepare a lubricating oil composition comprising the steps of:
- (I) mixing together:
- a) an oil of lubricating viscosity comprising a Group II base oil, a group III base oil, or combinations thereof;
- b) an antioxidant component comprising:
- (i) an alkylated diphenylamine, and
- (ii) a substituted hydrocarbyl mono-sulfide;
- c) a dispersant component comprising at least one of:
- (i) a polyetheramine,
- (ii) a borated succinimide dispersant,
- (iii) a non-borated succinimide dispersant,
- (iv) a Mannich reaction product of a dialkylamine, an aldehyde and a hydrocarbyl substituted phenol;
- d) optionally other additives.
Dependencies are inferred from the claim text.